Corrugated compensation: also known as expansion joints, expansion joints, primarily for the protection of the safe operation of the pipeline. English name for the expansion joints, Bellow Expansion Joint, is a flexible, thin-walled, having transverse corrugations telescoping device, which consists of metal bellows and component composition. Bellows compensator works primarily using its own elastic deformation function pipeline axial compensation due to thermal deformation, mechanical deformation and a variety of mechanical vibration generated, angular, lateral displacement, and combinations thereof, are resistant to the role of compensation pressure, sealing, corrosion resistance, temperature resistance, impact, vibration and noise reduction features, serve to reduce distortion and increase the life of the pipeline pipeline effect.